Nita Kusumawati, Supari Muslim, Anang Kistyanto
This research aims to get the optimum operational condition on blacu staining. More specifically, this research aimed to determine the influence of mordanting time on blacu fabric color quality, which include: The intensity and the differences of blacu colors before and after washing process, as well as the mechanical resistance of the blacu fabric against external load. To get the color intensity as coloring result using naphtol and indigosol and also color differences of blacu fabric as the consequences of washing process, analysis has done by using Difuse Reflectant Visible Ultraviolet (DRUV) instruments. Analysis results using DRUV can indicate four things, namely: Color absorption by blacu fabric, color fade resistance of a blacu fabric, the differences between the blacu fabric coloring results which is done with and without mordanting process, and also the color differences on blacu fabric before and after washing process. Based on the results of DRUV analysis obtained, known that the mordanting process that is done before dyeing process using naphthol, will increase the color intensity which is applied to the blacu fabric. Moreover, it also appears that the mordanting process also has decrease fastness of blacu fabric. The color intensity produced from blacu dyeing process using naphthol dye on the range 96.99% - 99.41% (before leaching) and in the range of 92,88% - 99,03% (after leaching). In the meantime, to find out the influence of the mordanting process against mechanical strength of colored blacu fabric, on this experiment also conducted the analysis using autograph instruments. This analysis result will show the maximum robustness of blacu fabric against external load. Based on the results of analysis using autograph, note that the mechanical strength resulting from the dyeing process with naphthol (without mordanting process) varied in the range 20,740.37 N/m2 - 35,645.93 N/m2. The highest fabric mechanical strength produced by naphthol yellow, while the lowest fabric mechanical strength produced from dyeing using naphthol red.
Chemistry Department, Universitas Negeri Surabaya, Surabaya, Indonesia; Electrical Engineering Department, Universitas Negeri Surabaya, Surabaya, Indonesia; Economy Department, Universitas Negeri Surabaya, Surabaya, Indonesia
